On Tuesday 04 Nov 2003 7:02 pm, Lee Elliott wrote: <snip> > > What is the effect of adding --build to ./configure? > > I already set the appropriate -march, -mfpmath and -msse flags for > compilation - does the --build option just invoke some of these flags or > does it do something else? > > LeeE > I just tried it... # make clean # ./configure --with-threads --build=athlon
Configure reports that it is building for an i686-pc-none or something like that... #make This gives me an fgfs that is only a few hundred bytes bigger than the previous one. Sitting at the default start location on 28R at KSFO with the engine running and the brakes on, with the external view from directly astern of the default Cessna, I was getting 25 fps, and now I get 30 fps. A low orbit around beautiful downtown San Francisco rarely pulls the framerate below 17 fps, which is better than before, but nothing dramatic. Note that this is only FG recompiled with the =athlon switch but it's a generic config option; next time I do SimGear+plib+FG I'll apply it to all and see if there's a noticeable difference. Somewhere, there will be information about how gcc optimizes for i686 as opposed to i386, which I suppose is what it uses normally. I would expect that -march=athlon has the same effect...? Jonathan _______________________________________________ Flightgear-users mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-users
